Ok, to put it another way...
I want to get the edges, floor pans etc of a shell blasted, I want to get it home into my nice garage and get some paint on the exposed areas. I am aware that primer is porous..
What would you use to paint it with bearing in mind that I don't want to have to strip that paint off again?
Shoot it in zinc paint?
Bilt-Hamber Electrox is supposed to be good or Isopon182?
If you're only doing small areas, you could even just use galvafroid in rattle-cans.
Al.